Improvement in tinners  tools



UNITED STATES PATENT OFFICE.

GEORGE F. RROCHON, OF PORTLAND, CONNECTICUT, AssIGNoR To THE HEATH asMITH MANUFACTURING COMPANY, OF sAME PLACE.

IMPROVEMENT iN TlNNERS TOOLS.

Specification forming part of Letters Patent No. 130,106, dated August6, i872.

Specication describing an Improved Tinners Tool, invented by GEORGE F.BRoCHoN, of Portland, in the county of Middlesex and State ofConnecticut.

The tool is especially useful in turning over the edge of conical-shapedconstructions of tin or sheet-iron. These conical constructions are muchused for milk-pans, colanders, strainers, and various other wares, andthe proper stidening of the edge at the large end ofthe cone by ordinarytools involves some difficulty. My tool commences at any given point onthe edge and traverses around, bending the edge first partly and thenentirely over upon itself, so as to form a perfect edge and stiffen thework completely. A wire may be inserted, or not, as the character of thegoods shall require. I employ two grooved rollers, peculiarly mountedwith reference to each other, and capable of adj ustability within widelimits to allow for dierent sizes and different degrees of conin g. Thetool may be used in turning over the edge of wares which are not conicalat all, but are j perfectly cylindrical.

The following is a description of whatI consider the best means ofcarrying out the invention. The accompanying drawing forms a part ofthis specification.

Figure 1 is a plan view of a lathe with my improved tool attached. Figs.2, 3, and 4 represent the improved tool alone. Fig. 4 is a plan view.Fig. 3 is a section, partly in elevation; the section is on the line T Tin Fig. 4. Fig. 2 is avertical section, partly in elevation 5 thesection is on the line S S in Fig. 4. Fig. l shows a piece of conicalWare in position in the lathe.

It is represented as having' been partially treat-V ed by the tool.

Similar letters of reference indicatelike parts in all the figures.

VVVA is'the fixed frame-work of a lathe, provided with a suitable chuckand pulley, B B', and a suitable tail-center, C, for grasping andturning around conical pieces of ware by the aid of a belt (notrepresented) traversing on the pulley B. There is an adjustableplatform, A1, secured by screw-bolts or other efficient means (notrepresented) reaching forward from the lathe, and adapted to support thetool through the medium of the adjustable pieces A2 and A, with theirclampingscrews to aid in determining their position, and in slowlymoving the tool in either direction, as will be readily understood. Theclamping-screw a2 on the long adjustable piece A2 carries the adjustablepiece A3 and the tool mounted thereon bodily forward and backwardobliquely, and is set at an angle exactly. coincident with the Obliquityof the cone. The other screw a3 is mounted in the piece A3, andtraverses the tool at right angles to the other. The piece of tin-warewhich is being treated is marked M. It is drawn as having the edgecompletely turned over at a single operation of the rollers; but it maybe, and generally is, in practice, preferable to bring the rollers tobear on the edge of the tin and by degrees to roll it over completely bya succession of small rollings. In other words, thebelt running on thepulley B is allowed to revolve the tin-ware M some ten or twenty timesin order to complete the rollingand stilfenin g of the edge. Thisdepends on the position `in which the tool is set by means of the screwa2. Usually the tool will be out of contact-with the edge of the wa-re Mwhen it is rst introduced and commenced to be revolved in the lathe, andit will be gradually brought into contact as the tin rapidly revolves.

There is still another piece or movable platform, marked A4, which Iconsider as a further adjunct of the lathe rather than as a part ofmyimproved tool. The function of lthis latter piece A4 is simply tosupport the tool and to carry it against the chuck of the lathe. Themotion communicated by means of the screws a2 t3-is through the mediumof the support or platform A4, which slides on the piece A3. The tool iscapable of swiveling only onv the piece A4, and maybe turned around andadjusted thereon at pleasure. D is the main foundationpiece of theimproved tool. It is secured by two bolts, d, standing in curved slotsin the piece D. One only of these screw-bolts d is represented in Fig.3; both are indicated in dotted lines in Fig. 4. There is a straightchannel of rectangular section extending nearly across this piece D,which receives a sliding bar, E, of corresponding section. A spring, c,tends to drive this bar outward with a gentle force, and press itagainst the chuck of the lathe to cause its roller F to take hold of andcommence the process of rolling over the edge of the tin-ware M. Thisroller F turns on the pivot f, set into the end of the bar E, by the aidof the set-screw f. G is a top platform or Vlat circular plate, ittin gupon the upper surface of the platform D, and adjustable in positionthereon by means of the screws g, which stand in curved slots therein,as represented. Both these screws g are shown in Figs. 3 and 4. Thepiece G has rmly attached a broad upright portion, G which forms asupport for the other adjustable roll through the medium of theadjustable plate H, bar I, and pin or pivot k. The plate H is adjustableon the upright portion G byV means of two screw-bolts, It h, which standin curved slots in the piece H and allow the latter to be inclined tovarious degrees. There is a square hole through the plate H, whichreceives the bar I, of corresponding section, and allows it to beadjusted endwise therein, being held in any position desired by means ofthe set-screw i. It will be understood that there is a large round holein the upright G', large enough to allow the square bar I to pass freelythrough and be turned in any position without touching. The groovedroller J is xed on the bar I by means of a pivot, k, held by aset-screw, k. It will be observed that while the roller F is pressed upto its work by the constant gentle force of the spring e the roller J,which succeeds it in its action on the edge of the ware M, is stifflyheld in position, and is pressed up only by the action of the screw ai.I find by trial that this arrangement is the best for seizing the edgeof the tin, deiiecting it gently outward at first, and afterward seizingit more firmly and curling it over.

In the operation of the tool the screw a2 is turned by hand to carry theentire tool and its connections to the right and toward the operator, soas to be clear of the ware M entirely. Having thus removed the rollers Fand J entirely out of the way, the tail-center U is liberated and thepreviously-treated piece of ware M is removed, and a new piece insertedand again seized by the proper adjustment of the tail-center. There maybe automatic or spring apparatus for this purpose, as will be readilyunderstood. So soon as the new piece of ware M is properly in positionand is rapidly Whirlin g on the chuck the right hand of the attendant isapplied to the crank and the screw a2 l is turned so as to move the toolalong in the line of the Obliquity of the cone. This soon brings therollers F and J both into contact with the edge of the ware M. Thelowermost roller F first touches the edge and commences to curl itoutward. Then the next roller J seizes and completes the operation ofturning it over. I have before explained that if the tool is movedsufciently fast the whole operation of turning over the edge may beperformed in one revolution of the ware M, but

that ordinarily it will be treated at several successive operations. Ineither event the time is inappreciable, and so soon as the edges seem tobe completely turned over and finished the motion of the hand-screw a2is reversed and the tool again carried back out of the way, thetail-center liberated, and the iinished ware removed. The operation maythus be repeated rapidly as long as may be desired.

It is unnecessary to remark that after the entire lot of any given sizeand shape of cone has been treated a lot of goods having the sameinclination of the cone and a smaller or larger size may be treated onthe same chuck, and a readjustment only of the tool will be required,while if it is required to treat a lot of goods having a differentinclination of the cone a different chuck and tail-center must besubstituted, and a readjustment of the parts A2 A3 will be required.Mechanics accustomed to this class of work will readily understand whenit is simply explained that the screw a2 must always be parallel to theside of the cone of the goods M.

I have represented a groove on each end of each roller F and J, and Iprefer to so construct the rollers, in practice, in order to increasetheir durability by allowing them to be turned end for end whenrequired. It will be understood that only one groove in each roller isused at any one time.

I am aware that rollers variously grooved and arranged have been longemployed in analogous positions for treating thin wares, and

that it has been common to adjust them in a great variety of positions.But I am not aware that any one has before employed or suggested asingle compact tool having the capacities of mine or capable of treatingwith the same facility and perfection the edges of conical ware.

Having now fully represented my tool and sufficiently explained itsoperation to enable those skilled in the art to avail themselves of itsadvantages, I claim as my inventionl. The two rollers F and J, mountedin adjustable positions on the movable support D, and adapted to bemoved forward by the screw a2, or an equivalent traversing means, so asto act on the edge of conical ware M, which is revolved in contact withthe rolls, and smoothly fold over and stitfen the edge, as herein setforth.

. 2. In combination with the above, the spring e, pressing the roller Fto its work with a constant gentle force, as specified.

In testimony whereof I have hereunto set my name in presence of twosubscribing witnesses.

GEO. FREDERIC BROCHON.

Witnessesz JNO. H. HALL, THEO. P. AUs'rIN.

